Design

An assortment of bolos and related implements (descriptions at left).

Bolos are characterized by having a native hardwood or animal horn handle (such as from the carabao),[8] a full tang, and by a steel blade that both curves and widens, often considerably so, at its tip.[1][5] This moves the centre of gravity as far forward as possible, giving the knife extra momentum for chopping.[8]

So-called "jungle bolos", intended for combat rather than agricultural work, tend to be longer and less wide at the tip.[1][5]

Other uses of the term

In the United States Military, the slang term "to bolo" – to fail a test, exam or evaluation, originated from the combined Philippine-American military forces including recognized guerrillas during the Spanish-American War and the Philippine Insurrection; those local soldiers and guerrillas who failed to demonstrate proficiency in marksmanship were issued bolos instead of firearms so as not to waste scarce ammunition.[15]